Gene Expression & Genetic Engineering

• Each cell in you body except sperm/egg has the same DNA
• Each cell only expresses a small percentage of genes
  • Each cell only expresses a small percentage of genes
• Example: Nerve and muscle cells perform very different functions. Thus they use different genes.

Recombinant
Material that has been genetically engineered. A gene that has been removed from its original genome and combined with another.

Germ Line Therapy

• Germ line
  • Embryotic therapy
• Somatic cell
  • Fix or replace a defective cell. Only in specific cells.
  • Require several treatments per year